Collapsible core



entran JOHN TRAUM, 0F COSHOCTON, OHIO.

COLLAPSIBLE CORE.

Specification 0f Letters Patent.

Patented Feb. 15, 192i.

Application filed June 30, 1920. Serial No. 393,163.

To all whom t may concern.'

Be it known that l, JOHN TRAUM, a citizen of the United States, residing at Coshocton, in the county of Coshocton and State of Ohio, have invented certain new and useful Improvements in' Collapsible Cores; and I do hereby declare the following to be a clear and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to the construction and vulcanization of casings such as are used in combination with pneumatic tubes. The combination being usually referred to as the pneumatic tire.

The device is a collapsible core upon which the casing isl constructed and vulcanized, and the object of the invention is to provide a collapsible core which is made up of a series of sections capable of being quickly and accurately assembled and connected to form an annular core and of being easily and quickly separated and removed, one by. one, from the vulcanized casing.

The invention relates particularly to the means by whichthe adjacent ends of companion sections forming the core may be quickly and easily connected in operative relation, and disconnected in such manner as will allow the separated sections to be removed from the vulcan'med casing, and

to the adaptability of the parts alining and locking the core sections to any preferred method of constructing the sections, as for example they maybe cast hollow, or solid, or they may be employedwith pressed metal sections adapted to be mounted on a properly, divisioned ring. u p

A very desirable feature ofthe invention that is not in use in any collapsible core with which I am acquainted, is, that in my invention as described in this speciiicatiomthere is not required the usual pins and corresponding recesses in the abutting ends of companion sections to` aline the assembled core in circumferential relation; the disadvantage of the pins and corresponding recesses which are ,usually employed, is, that when removing the separated sectionsfrom the vulcanized casing, and with the key section removed, the. sections remaining within the casing are yetsecured in true circumferential alinement at their abutting ends by the pins.A Thus,V it is evident that one of the ends only of the section to be next removed is free to move inward and through the rift in the inner periphery of the casing untilthe angle of its ends relative to the remaining sections is such as will free the union established by the pins with the remaining section.

In my invention as will be readily observed, by the absence of the circumferential alining parts when the sections are to be removed from the vulcanized casing, and, by reason of their lines of division, the sections are peculiarly free to be removed from within the vulcanized casing. With these ends in view the invention consists of the novel construction of parts, and their relative adaptability as hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims.

. Referring to the drawings: Figure l is a section of the circumference of the assembled core, illustrating the means employed to aline and lock the sections. Fig. 2 is an end view of one of the sections, a section of the lug adapted to lock the abutting ends of the sections, and is also a cross section of the core. Fig. 3 is a perspective view of one of the slotted, tapered pins adapted to aline the sections. Fig. i is a perspective view of a triangular shaped lug that is secured to one end of the abutting ends ofV companion sections.

Referring to Fig. l it will be observed that the angle and points of division of the several sections are such as will allow the separated sections to be removed from the` vulcanized casing. To this end it will be noticed that the key section has parallel ends, but

it is also desired to direct attention to the fact that the sections adjacent to the key section, separate from the remaining section at substantial right angles to the line of separation from the key section, thereby requiring less effort for their removal from the vulcanized casing` than is the case when their lines of division are more nearly true radial lines.

The collapsible core is an annulus which is made up of a plurality of segment shaped sections` Four of the sections are employed in the construction shown, and are indicated in the drawing Vby reference numbers, l, 2, 2, and 3. The section l is the key section, or the section which must be last placed in position when assembling the core, and is the irst section to be removed When the coreis to be removed from the vulcanized casing. Y

In the completed form ofthe inventionY as described in this specification, the means for separately connecting adjacent sections consists in providing in one oi? the abutting ends oi' the sections, tapering openings Which receive corresponding tapering pins adapted to be driven in the said openings, having irst engaged talvieringopenings in hereinafter described triangular shaped lugs carried by the companion sections, the said tapering pins simultaneously contacting in keying relation in the alined tapered openings of 4companion sections, and in cooperation with hereinafter described lugs :arried inthe outer periphery7 oi' one oi coinpanion sections securely lock the sections in operative relation. 4

Referring toFigl and to the triangular shaped lugs Which are represented by the numerals 4 it will be observed that the lugs are ladapted to openings inthe ends ot' the sections, and are permanently secured to the sections by any suitable means, such as by threading the stems 6 or bypins engaging the'stems througliopenings in the sections. The surface of one of thesides of the triangular shaped .lugs aline With,jand form a continuation of the'surface of the ends of the section to Which'it is secured, and which in the assembled 'core occupy Vshaped openings in the inner periphery of the inwardly directed ange'of the sections.

Tapered openings centrally located in the triangular shaped lugs at substantial right angles to thesteniG securingtlie lugs, and coincident with corresponding tapered openings in the adj acent'sectionsfthe said tapered openings when valin'ed forni acute and obtuse angles v'with the line of division of companion sections, and are adapted to receive corresponding slotted, tapered pins 5 that aline the abutting ends of companion sections. Y Y

, Rei'erringto Fig. 3 and tothe tapered, pins Whichaline, and `in coperation with'` the locking device' indicated by the numerals 8, and 9,"1n the drawings, secure the sections,

and that are provided with longitudinal slot'-v ted openings, -7 the. double function of which will .beV hereafter apparent., it. may be ,re-a marked 'that' the4 taperv Will permit them Yto,

readily engagev their respective tapered openingsv avhenzthe abutting ends of. companionf Vsections are placed in Juxtaposition.

-Referring to the locking lugs inthe outer peripheryand at the ends of one of abutting sections, `'it will be noted that the enlarged triangularshaped ends of the Vlu'gsjQ, are

"directed inwardly and are adaptedfto en-YV f gagecorrespondinglyV directed openings in thejabuttingendsof their companion sec-- V tions,l and,` that by reason `ot' the key secpins when they are placed Within the nearly 'Y Y alined openings and driven home.

By the means described the alining and lockingin operative relation oftV the core sei-- tions isbrought Within the scope ot' one simple and 'easily executed operation.

The doubletunction ci' the longitudinal slotted openings in the tapered pins, is, by Y the contracting and expanding action given that part of the pin ivithintlie triangular shaped lug there is assured a rigid contact between lugs and pins, yet, vby thereactive flexibility given that part of the pins by the slotted openings they will be permitted to advance' any slight distance Vwithin the taiered o Jenings -in theluffsgthat ma f be l, is 5 required to' assure the saine rigid contact between the pins and the sections.

A drift of suitable conformationto engage the .slots in the pins is tlielonlytool Vrequired to disconnect the sections.

With the tapered pins removed from Withby4 the sections, triangular shaped lugsl adapted to occupy V shaped openings in the `in the tapered openings, the key section,V

innerV periphery and at the contacting points of 'the flanges `carried by abutting sections, the surface of one of their sides alining with Y,and forming acOntinuatiOn of the surface of the .endsof the sections tof Whichthe lugs angular shaped lugs to the sections.

" 2. In a collapsible corethercombination ot a plurality4 of sections .adaptedto' abut end Wise, .inwardly directed-.flanges carried Vb v thesections, .triangular shaped lugs Yadauoted to-'andzfsecured .to some ofthe sections,vta peredopenings inthe triangular shaped lugs forming an obtuse. angleV with the abutting ends of the sections to be alined and flocked',

thesaid tapered openings being adapted to receive slotted, tapered .pins .adapted to engV Y gage; tapered openings Y in the abuttingY ends of adi acent ,sections `coincident; with?? and.

A are secured, and means for securing the triforming a .continuation of: the tapered openf ingsfin the triangular shaped lugs `andlat an acute angle With the abutting ends of the sections to be alined and locked.

3. In a collapsible core the combination of a plurality of sections adapted to abut endwise, inwardly directed flanges carried by the sections, lugs adapted tolock the sections in operative relation secured in the outer periphery of one of abutting ends of companion sections, the said lugs being adapted in circumferential direction their ends terminating in inwardly directed projections adapted to engage correspondingly directed openings in the outer periphery of one of abutting ends of companion sections, their union being effected by a radial movement of the sections as substantially described.

4. In a collapsible core the combination of a series of sections adapted to abut endvvise, inwardly directed flanges carried by the sections, a key section having parallel ends adapted to secure triangular shaped lugs provided with tapered openings registering with corresponding tapered openings in the adjacent section, slotted tapered pins that aline the sections adapted to be engaged by the said tapered openings in the triangular lugs and in the ends of the abutting sections, circumferential slotted openings in the ends and in the outer periphery of the key section and some of the ends of the series of sections terminating in inwardly directed triangular openings adapted to receive circumferentially directed lugs terminating in inwardly directed projections carried by the sections adjacent to the key section and some of the ends of the series of sections` and which with the coperation of the said slotted tapered pins aline and lock in operative relation the key section and the series of sections forming the annular collapsible core.

ln testimony whereof I afliX my signature.

JOHN TRAUM.

Witnesses:

T. H. WHEELER, J. A. BALGH. 

